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09-01-2021, 04:15 PM
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#1
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Member
Monaco Owners Club
Join Date: Dec 2019
Posts: 52
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2003 Monaco Windsor low air alarm problem
Normally, my low air alarm makes a steady pulse beep that stops when air pressure meets minimum.
For quite some time, on occasion, the low air alarm would make other noises, sometimes a faster pulse, higher pitched beep, other times a steady tone. Always before it would stop when pressure was at minimum.
Now, the alarms sounds the high fast pulse pitch and when air pressure meets minimum the alarm changes to a steady tone. It continues for a random period then shuts off (one time it took an hour).
Everything about the air brakes seems fine, once the alarm stops, it works normally as long as the pressure is above minimum.
What could be causing the alarm to sound so crazy?
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09-01-2021, 09:24 PM
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#2
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Senior Member
Join Date: Apr 2018
Posts: 3,441
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Pressure switch , can't tell you where it is , right off the park brake airline would be my first thoughts.
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09-02-2021, 07:01 AM
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#3
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Senior Member
Monaco Owners Club
Join Date: Jun 2014
Posts: 14,608
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Here is a thread on the park brake switch which is mounted to the Nason valve.
https://www.irv2.com/forums/f115/my-...ch-197560.html
Nodine did a very good writeup on this post #32.
__________________
Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
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09-02-2021, 09:05 AM
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#4
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Senior Member
Join Date: Apr 2018
Posts: 3,441
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Quote:
Originally Posted by jacwjames
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Great link. So the op's problem is down on the airtank.
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09-02-2021, 11:21 AM
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#5
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Senior Member
Monaco Owners Club
Join Date: Jun 2011
Location: CA
Posts: 4,486
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Quote:
Originally Posted by shootist
Great link. So the op's problem is down on the airtank.
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The switch referenced in Bob Nodine's nice write up is on the parking brake plunger. I did follow his article and did the swap a few years ago and have not had an issue since.
Previously I had changed out that switch at least 3 or 4 times. I stopped counting.
If I were OP, I'd probably start by changing out this switch, but he mentions that the "low air alarm tone" changes. That alone is suspect that something else is going on. It's possible the speaker annunciator box, under the dash, is acting up.
__________________
Bill & Brigitte
06 Windsor PEQ, Cummins 400 ISL
2014 Honda CRV or 2012 Jeep
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09-02-2021, 04:33 PM
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#6
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Senior Member
Join Date: Apr 2018
Posts: 3,441
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Quote:
Originally Posted by windsorbill
The switch referenced in Bob Nodine's nice write up is on the parking brake plunger. I did follow his article and did the swap a few years ago and have not had an issue since.
Previously I had changed out that switch at least 3 or 4 times. I stopped counting.
If I were OP, I'd probably start by changing out this switch, but he mentions that the "low air alarm tone" changes. That alone is suspect that something else is going on. It's possible the speaker annunciator box, under the dash, is acting up.
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Somewhere in the thread the low air pressure switch is mentioned as being on the ping tank.
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09-02-2021, 05:05 PM
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#7
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Senior Member
Monaco Owners Club
Join Date: Jun 2011
Location: CA
Posts: 4,486
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Quote:
Originally Posted by shootist
Somewhere in the thread the low air pressure switch is mentioned as being on the ping tank.
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I'd have to re-read that article since it's been several years. But as I recall, when I did the nason re-build, it was all up at the plunger.
The low air pressure switch probably is on the tank, but the different tones the OP is mentioning keeps me thinking it's an annunciator issue.
__________________
Bill & Brigitte
06 Windsor PEQ, Cummins 400 ISL
2014 Honda CRV or 2012 Jeep
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09-02-2021, 05:31 PM
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#8
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Junior Member
Join Date: Mar 2021
Posts: 7
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On our 04 Monaco dynasty the low air pressure alarm switch is underneath the very left switch panel, the one with the park brake switch on it, towards the very front. You may want to look there too.
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09-02-2021, 05:42 PM
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#9
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Senior Member
Join Date: Apr 2018
Posts: 3,441
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Quote:
Originally Posted by freesian
On our 04 Monaco dynasty the low air pressure alarm switch is underneath the very left switch panel, the one with the park brake switch on it, towards the very front. You may want to look there too.
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That's where you would naturally think it would be. Having the same coach as yours, now I know where mine is :-)
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09-03-2021, 10:09 AM
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#10
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Member
Monaco Owners Club
Join Date: Dec 2019
Posts: 52
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Thank you all for the advice. I read the linked article and despite my very limited knowledge of air brakes it was helpful.
Everything suggests replacing the parking brake pressure switch first so I'll be ordering one. Can I disconnect to see if it stops the tone without a problem?
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09-03-2021, 10:28 AM
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#11
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Senior Member
Monaco Owners Club
Join Date: Jun 2011
Location: CA
Posts: 4,486
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Quote:
Originally Posted by Ttinuse
Thank you all for the advice. I read the linked article and despite my very limited knowledge of air brakes it was helpful.
Everything suggests replacing the parking brake pressure switch first so I'll be ordering one. Can I disconnect to see if it stops the tone without a problem?
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You can go inside your dash and find this little box.
This is what is actually making the beeping noise you're hearing. Easy to track down by following the sound. You can unplug it, but keep in mind, you won't have any audio warnings.
__________________
Bill & Brigitte
06 Windsor PEQ, Cummins 400 ISL
2014 Honda CRV or 2012 Jeep
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09-04-2021, 08:42 AM
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#12
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Member
Monaco Owners Club
Join Date: Dec 2019
Posts: 52
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Quote:
Originally Posted by windsorbill
You can go inside your dash and find this little box. Attachment 341883
This is what is actually making the beeping noise you're hearing. Easy to track down by following the sound. You can unplug it, but keep in mind, you won't have any audio warnings.
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Thank you!
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09-14-2021, 01:29 PM
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#13
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Junior Member
Join Date: Dec 2020
Location: Vilas NC
Posts: 18
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Quote:
Originally Posted by Ttinuse
Normally, my low air alarm makes a steady pulse beep that stops when air pressure meets minimum.
For quite some time, on occasion, the low air alarm would make other noises, sometimes a faster pulse, higher pitched beep, other times a steady tone. Always before it would stop when pressure was at minimum.
Now, the alarms sounds the high fast pulse pitch and when air pressure meets minimum the alarm changes to a steady tone. It continues for a random period then shuts off (one time it took an hour).
Everything about the air brakes seems fine, once the alarm stops, it works normally as long as the pressure is above minimum.
What could be causing the alarm to sound so crazy?
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Pressure switch under break Valve
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09-14-2021, 01:30 PM
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#14
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Junior Member
Join Date: Dec 2020
Location: Vilas NC
Posts: 18
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Have same problem last year. Simple fix
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